Which of the following is true of the contraction of

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Surgical Technology for the Surgical Technologist: A Positive Care Approach
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Chapter 14 / Exercise 3
Surgical Technology for the Surgical Technologist: A Positive Care Approach
Association of Surgical Technologists
Expert Verified
49) Which of the following is trueof the contraction of the heart?A) The ventricles contract first, followed by the atria.B) The contractions do not occur in any specific repeatable sequence each time.C) Cardiac contractions are coordinated by specialized conductive cardiac muscle fibers.D) The muscle obtains the beat from the pacemaker region exclusively.E) None of the answers are correct.Answer:
C50) Pacemaker cells of the SA node depolarize about
C51) The phase of the cardiac cycle during which each chamber contracts and pushes blood into the next structure is
C52) During most of ventricular diastole, the
E
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Surgical Technology for the Surgical Technologist: A Positive Care Approach
The document you are viewing contains questions related to this textbook.
Chapter 14 / Exercise 3
Surgical Technology for the Surgical Technologist: A Positive Care Approach
Association of Surgical Technologists
Expert Verified
53) During one cardiac cycle the ventricles spend most of their time in A) systole.B) contraction.C) fibrillation.D) diastole.E) None of the answers are correct.Answer:
D54) The chambers of the heart empty during
C55) During their period of systole, the inner volume of the atrial chambers
B56) The most important factor in ensuring that blood moves in correct order through the heart is (the)
D57) In terms of time, at rest one cardiac cycle lastsA) about 1.5 seconds.B) a little under 1 second.C) 5 seconds.D) about a half second.E) None of the answers are correct.Answer:
B58) Which of the following conditions would cause the amount of blood entering the ascending aorta with each contraction of the heart to increase?
C59) Nodal activity of the heart may be influenced or modified by
B60) At rest the heart rate is usually ________ by parasympathetic control.
B61) How would the heart rate be affected if there were a blockage of the AV node?A) The heart rate would be unaffected.B) The heart rate would increase.C) The heart would cease to contract.D) The electrical stimuli from the SA node would be normal, but the rate of contraction would slow or be irregular.E) The heart rate would slow dramatically, and become extremely irregular, contracting only when the ventricles became overfilled.Answer:
D

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